xsi:nil=”true”

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xsi:nil=”true”

2013年08月24日 ⁄ 综合 ⁄ 共 1525字 ⁄ 字号小中大 ⁄ 评论关闭

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2. Relax NG

http://www.xmlforasp.net/schemavalidator.aspx

http://www.zvon.org/xxl/XMLSchemaTutorial/Output/ser_over_st0.html

We can override the schema declaration when setting xsi:nil attribute to value "true". The schema must allow this by setting attribute "nillable" to "true" (default value is "false").

Valid document
This document is valid, the element "root" contains the "e1" element.

Valid document
This document is valid too, because the "xsi:nil" attribute overrides element's definition and allows the element to be empty.

Invalid document
This document is not valid, because when "xsi:nil" is true, the element must be empty (and "root" is not).

Invalid document
This document is not valid, because the element "root" must have "e1" child and "xsi:nil" has not been set to "true".

Correct XML Schema (correct_0.xsd)

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>

  <xsd:element

name="root"

nillable="true">

    <xsd:complexType>

      <xsd:sequence>

        <xsd:element

name="e1"

type="xsd:string"/>
      </xsd:sequence>

    </xsd:complexType>

  </xsd:element>

</xsd:schema>

2. Relax NG

There is no such mechanism in Relax NG.

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【下篇】菜鸟啊，关于动态数组的释放问题

作者: mell

该日志由 mell 于11年前发表在综合分类下，最后更新于 2013年08月24日.
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xsi:nil=”true”

2. Relax NG

作者: mell

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